QUANTUM-SIZED PBS, CDS, AG2S, SB2S3, AND BI2S3 PARTICLES AS SENSITIZERS FOR VARIOUS NANOPOROUS WIDE-BANDGAP SEMICONDUCTORS

Citation
R. Vogel et al., QUANTUM-SIZED PBS, CDS, AG2S, SB2S3, AND BI2S3 PARTICLES AS SENSITIZERS FOR VARIOUS NANOPOROUS WIDE-BANDGAP SEMICONDUCTORS, Journal of physical chemistry, 98(12), 1994, pp. 3183-3188
Citations number
38
Categorie Soggetti
Chemistry Physical
ISSN journal
00223654
Volume
98
Issue
12
Year of publication
1994
Pages
3183 - 3188
Database
ISI
SICI code
0022-3654(1994)98:12<3183:QPCASA>2.0.ZU;2-P
Abstract
We have investigated the sensitization of nanoporous titanium dioxide, zinc oxide, tin dioxide, niobium oxide, and tantalum oxide by quantum -sized cadmium sulfide, lead sulfide, silver sulfide, antimony sulfide , and bismuth sulfide. It was shown that the relative positions of the energetic levels at the interface between the quantum size particles and the oxide substrate can be optimized for an efficient charge separ ation by utilizing the size quantization effect and by varying the mat erials of the particles and the substrate. Photocurrent quantum yields of up to nearly 80% and open circuit voltages up to the 1-V range wer e measured. We showed that the photostability of the electrodes could be significantly enhanced by surface modification of the particles.